This article contains a direct quote from President Bush promising to appoint "strict constructionists":
http://polazzo.stuysu.org/can_bush_deliver_a_conservative.htm
But in the debates Al Gore made up the quote, "in the mold of Scalia . . . " out of whole cloth. Bush never said it. At least I haven't been able to find it.
I haven't been able to find it either, but the way Gore phrased it in the debates, and the absence of reaction by then-candidate Bush, leads me to believe that then-president Bush was the first (of the two) to say that.
I'm still looking for old transcripts that substantiate my belief. As I noted, if anyone has a repository to campaign speech text, my offer to review it stands.